Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Charles Willis Fanelli, BCBA
Behavior Analyst in Bethesda, MD · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285379719
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Registry record
Entity type Individual (Type 1)
Name Charles Willis Fanelli
Credential BCBA
Sex Male
Practice address 5272 River Rd Ste 100, Bethesda, MD, 20816
Phone (301) 718-1716
Enumeration date Apr 29, 2022
Last updated in NPPES Apr 29, 2022
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License LBA1279 (MD) Primary
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Charles Fanelli?
Charles Fanelli is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-29.